Hach-Lange FILTRAX User Manual - Manual (Page 8)

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General information
2.2 Applications
The FILTRAX sampling system is a device for the filtration and pumping of waste
water samples from the activated sludge tank or final clarification tank for
supplying process instruments with samples free of solids.
2.3 Functional description
The FILTRAX sampling and sample conditioning system comprises two
components: a control unit and module carrier.
The module carrier (1) is immersed at the place the samples are to be taken using
a special tank edge fastening. Inside the module carrier there are two filter
modules (2); a filter membrane (3) is stretched over both sides of each of the
modules. The waste water sample is fed to a special duct system (4) via this
membrane.
Two tube metering pumps inside the control unit draw the sample alternately from
the two filter modules using a common 5 m long heated suction tube to the control
unit that is installed in close proximity to the sampling point. From there the
sample is pumped 2 m, 10 m, 20 m or 30 m, depending on the sample tube
connected, to the process instruments.
A venting device (5) underneath the filter modules largely prevents the adhesion
of solids to the filter membranes and significantly reduces the maintenance effort.
Two signal lamps (green and red) provide continuous visual indication of normal
operation, warnings and faults - this information is also provided electrically by two
floating relay contacts.
Fig. 2-1 Layout of the filter modules
N O T I C E
Any use other than use in accordance with requirements defined in the user manual
leads to the loss of the warranty claims and can lead to personal injury and property
damage, for which the manufacturer assumes no liability.